CN101002439B

CN101002439B - A method of sending CTI messages with varying delays

Info

Publication number: CN101002439B
Application number: CN2005800221802A
Authority: CN
Inventors: O·施罗特; M·沃尔克曼
Original assignee: Siemens AG
Current assignee: Unify GmbH and Co KG
Priority date: 2004-06-30
Filing date: 2005-04-29
Publication date: 2011-08-24
Anticipated expiration: 2025-04-29
Also published as: GB2416089A; GB0414566D0; EP1762057A1; EP1762057B1; CN101002439A; US8713123B2; WO2006002707A1; US20080205623A1

Abstract

There is described a method of sending CTI messages in a communications system. The method comprises assigning to each of a plurality of CTI messages a priority indicator selected from a plurality of different priority indicators, sending the plurality of CTI messages from a queue formed by the CTI messages such that the time interval between two messages sent from the queue depends upon the priority indicator assigned to the first of the two messages to be sent, whereby the time interval between messages being sent from the queue may vary.

Description

In communication system, send the method for CTI message

The present invention relates in communication system, send the method for CTI message.

Computer telephone integration (CTI) is the design that telephone service and computer system are linked and cooperate with each other.This technology has been available just from the mid-80, but also is not widely used up to date.This is attributable to the development (for example all-purpose computer) of new technology and is used to make phone and the definition of the international standard that computer system is interconnected.Computer support telephony applications (CSTA) calling modeling and consensus standard by European Computer Manufacture's Association (ECMA) development appear on the market as the mainstream standard of generally acknowledging, have defined the exchange using method of handling various callings.

The exemplary CTI communication system 1 of having described of Fig. 1, it comprises the server 2 that links to each other with a plurality of nodes (for example private branch exchange (PBX, Private Branch Exchange) 3).Each PBX 3 supports a plurality of equipment 3a, and described equipment can for example be system telephone, ordinary old style telephone (POT), cordless telephone, network backbone or the like.In this current C TI communication system, CTI information exchanges by CTI message between server and communication node.These message are usually as being encoded defined in the CSTA standard.In this case, the two-way exchange data therefore in some cases for business, are confirmed to be sent out, but are transmitted in unacknowledged mode in the described data of some situation.Message from the server to PBX is used to control appliance and establishment and controlling call.Message from PBX to the server is used to reporting facility state and call state.

In order to understand CTI message better, can be with reference to 7 layers of reference model of the open system shown in the figure 2 interconnected (ISO/OSI).CTI message is layer 7 application message.At the transmitting apparatus place, from application layer, CTI message is passed to one deck down from one deck, up to being transferred to ground floor, being in the physical layer.At the receiving equipment place, CTI message is received at ground floor, and upwards is delivered to last layer from one deck, up to arriving application layer.

If server moves a plurality of client applications simultaneously, then relevant with each application program CSTA message down may be along with the time occurs with mixed form in load situation (load situation).Typical C TI scheme (scenario) is made up of one or more CSTA message.For example, the CTI scheme can comprise a sequence " Makecall (generate and call out) ", " Deflectcall (deflection calling) ", " Setdisplay (display is set) " and " Answercall (answering call) ".If two application programs are carried out identical scheme simultaneously, then message may be mixed.Yet the distribution of message is always unique, because corresponding sign (ID) is used.All message may by exchange be come soon because information often may produce than message by formation.In Fig. 3, described respectively from the example of the formation of the output message of the server that leads to application program on operation first equipment and application program on second equipment and input message.

One high message load occurs, and message is just set up in formation, because about sending, must keep minimum time to postpone between continuous message.This minimum transmission lag is necessary for the action of handling expectation for the enough time of receiving equipment.Undertaken by regular LAN and ICP/IP protocol in the additional flow control of these message layer below.

Congested in formation is the result who increases the response time substantially.This effect is necessary technically, and still the angle from the user always is undesirable.

The objective of the invention is to address this problem.

WO01/01621 discloses a kind of congested method of avoiding in the internet webpage transmission.US6587875 discloses a kind of method, wherein changes the speed that sends data and avoids saturated.Yet they do not relate to the CTI field.

According to the present invention, the method that sends CTI message in communication system is provided, the method is characterized in that following steps: give the selected priority indicator from a plurality of different priority indicators of each distribution in a plurality of CTI message; Send a plurality of CTI message from the formation of forming by CTI message, make time interval between two message sending from formation depend on to be assigned to first priority indicator in two message to be sent, the time interval between two message that send from formation thus can change.

The present invention is above-mentioned to be set forth especially in the appended claims with other features, and becomes clearer with its advantage by with reference to the accompanying drawings exemplary embodiment of the present invention being described in detail, wherein:

Fig. 1 has described the CTI communication system;

Fig. 2 has described ISO/OSI7 layer reference model;

Fig. 3 has described the formation of output and input CTI message;

And be described in the above, in addition;

The sequential of the exemplary formation of describing CTI message of Fig. 4, the priority that is assigned to this message and transmission message.

The CTI message that is exchanged between the server and client side is not all of equal importance.For example, call control message must be promptly processed, and therefore be considered to very critical message of time.On the contrary, statistical message does not need processed apace, and therefore is considered to critical message of right and wrong time.

It is possible making difference according to the logic content of these message between these message, but for the following layer of packet data transmission, content is transparent.Therefore, this can and should not be changed yet.

In an embodiment of the present invention, the timing of the forwarding of CTI message is to make the time criticality of described priority Indication message according to the priority of distributing to message.

When message was delivered to transport layer, such priority was assigned to this message.This makes transport layer from discharging this message of logical interpretation.Only must carry out defined measuring (measure) for given priority.

In a preferred embodiment, following message priority is used:

CTI_PRIORITY_NORMAL

The message that is given this priority causes the load situation of far-end, and it requires message subsequently not to be sent out in the past in the time cycle that limits.This is the method that was used for all message in the past.

CTI_PRIORITY_HALFDELAY

These message cause the load situation of far-end, and it is enough making half of time of delay postpone for subsequently message.

CTI_PRIORITY_NOWORKDELAY

This priority is assigned to the message that almost can not produce any delay at far-end.Therefore, the message of any continuation can be without any lingeringly being sent out immediately after these message.

CH_PRIORITY_CANBEDELAYED

The message that is assigned with this priority is that the non-time like this is critical, so that described message even can be sent out in time after the message that is produced subsequently to help the faster response time.

Fig. 4 has exemplarily described the formation 10 of CTI message, is used for sending to specific PBX from server.Should there be independently formation in PBX for each serviced device control.Each message in the formation has been assigned with the priority in the above-mentioned priority list.The timing that this figure has also described is determined by the priority of distributing to message, message sends.

First message 11 in the formation has " Priority Normal ", therefore after sending this message, allows through stand-by period T regular or standard before second message 12 is sent out _NSecond message also has " Priority Normal ", so after sending this message, process stand-by period T regular or standard before the 3rd message 13 is sent out _NThe 3rd message 13 has " Priority Halfdelay ", means that after sending this message, it is the stand-by period T of standard that the time delay before sending the 4th message 14 only needs _NHalf.The 5th message 15 has " Priority Noworkdelay ", means after this message of transmission, does not postpone basically to be applied in before the 6th message 16 is sent out.Therefore the 6th message 16 is another " Priority Normal " message, after sending this message, in the 7th message 17, also apply the stand-by period T of standard before being sent out for " Priority Normal " message _N

The 8th message 18 has " Priority Canbe delayed ", therefore the transmission to this message is delayed always, up to the 9th message 19 with till after the tenth message 20 is sent out subsequently, wherein said the 9th message and the tenth message are " Priority Normal " message.Therefore, at the delay T of the transmission that is right after the 8th message 18 _NAfterwards, the 9th message 19 is sent out, at the delay T of the transmission that is right after the 9th message 19 _NAfterwards, the tenth message 20 is sent out, and last, and the 8th message 18 that is delayed is at the delay T of the transmission that is right after the tenth message 20 _NBe sent out afterwards.

Embodiments of the invention provide the improvement use and the minimizing in reaction time of CTI link.

Therefore, though described the present invention with reference to preferred embodiment, but should be understood that well, described embodiment only is exemplary, and can be under the situation of the scope of the invention that does not break away from the claims to be set forth the present invention be carried out as modification and change to technical staff's appearance of having suitable knowledge and technology.

Claims

1. in communication system, send the method for CTI message, the method is characterized in that following steps:

Give the selected priority indicator from a plurality of different priority indicators of each distribution in a plurality of CTI message (11-20),

Send a plurality of CTI message (11-20) from the formation of forming by CTI message (11-20) (10), two message (11-12 of one of priority of a feasible part that from formation (10), sends with " priority normal ", " priority halfdelay ", " prioritynoworkdelay ", permission standard stand-by period; 13-14; The time interval (1 15-16); 2; 3) depend on two message (11-12 of one of the priority of a part that is assigned to be sent having " prioritynormal ", " priority halfdelay ", " priority noworkdelay ", allows the standard stand-by period; 13-14; 15-16) first (11; 13; 15) priority indicator, the time interval (1 between the message of one of priority of a part that from formation, sends thus with " priority normal ", " priorityhalfdelay ", " priority noworkdelay ", permission standard stand-by period; 2; 3) can change, wherein priority indicator is represented the priority of message, wherein " priority normal " represents the priority of permission standard stand-by period, it is half the priority of standard stand-by period that " priority halfdelay " expression allows time delay, and " priority noworkdelay " expression allows not have the priority of delay.

2. according to the process of claim 1 wherein having " priority normal ", " priorityhalfdelay ", " priority noworkdelay ", allowing two message (11-12 of one of priority of the part of standard stand-by period of sending; 13-14; The time interval (1 15-16); 2; 3) according to being assigned to be sent having " priority normal ", " priority halfdelay ", " priority noworkdelay ", allowing two message (11-12 of one of priority of the part of standard stand-by period; 13-14; The priority of first 15-16) is the standard time of system postpones, the standard time postpones a part or zero-time any one in postponing basically.

3. according to the method for claim 1 or 2, the message (18) that wherein has " priority canbedelayed " can be delayed transmission till the message that is produced subsequently (19,20) is sent out afterwards.

4. according to the method for claim 1 or 2, wherein when CTI message was delivered to transport layer in system, priority was assigned to CTI message (11-20).

5. send the device of CTI message in communication system, described device comprises:

-be used for distributing the device of a selected priority indicator from a plurality of different priority indicators to each of a plurality of CTI message (11-20);

-be used for sending a plurality of CTI message (11-20) to make two message (11-12 of one of priority of the part that sends from formation (10) with " priority normal ", " priority halfdelay ", " prioritynoworkdelay ", permission standard stand-by period from the formation (10) formed by CTI message (11-20); 13-14; The time interval (1 15-16); 2; 3) depend on two message (11-12 of one of the priority of a part that is assigned to be sent having " prioritynormal ", " priority halfdelay ", " priority noworkdelay ", allows the standard stand-by period; 13-14; 15-16) first (11; 13; The device of priority indicator 15), the time interval (1 between the message of one of priority of a part that from formation, sends thus with " priority normal ", " priorityhalfdelay ", " priority noworkdelay ", permission standard stand-by period; 2; 3) can change, wherein priority indicator is represented the priority of message, wherein " priority normal " represents the priority of permission standard stand-by period, it is half the priority of standard stand-by period that " priority halfdelay " expression allows time delay, and " priority noworkdelay " expression allows not have the priority of delay.